Silo-door lock.



L. R. ABERCROMBIE.

SILO DOOR LOCK..

APPLICATION FILED FEB. 4. I916.

Patented June 12, 1917.

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SILO-DOOR LOCK.

To all whom it may concern:

Be it known that I, LEWIS R. ABEnoRoM- BIE, a citizen of the United States, and a resident of the city of Portland, county of Multnomah, State of Oregon, have invented a new and useful Improvement in Silo-Door Locks, of which the following is a specification.

This invention relates generally to silos and has particularly to do with looking devices by means of which the silo doors are forced into an air-tight fit against the sides of the door openings, and securely located in such position.

My invention particularly relates to silos built of wood, and in this connection has for its particular object the providing of a doorlocking means having a comparatively wide range of adjustment, so as to adjust the action thereof to the discrepancies due to the shrinking and swelling of the wood.

In the accompanying drawings:

Figure 1 is a fragmental front elevation of a silo showing the door clamped and locked in position over the door opening by means of my device; the operating levers are omitted from the left side of this figure;

Fig. 2 is a larger-scaled sectional detail taken approximately on the line 22 of Fig. 1; and

Fig. 3 is a horizontal sectional view on the line 33 of Fig. 2. In this view the operating lever is omitted, and the broken lines indicate different positions assumed by certain movable parts during the operation of the device.

1 In the drawings, the silo illustrated is of the well known wooden stave type, although my invention could be applied to other types of silo with equal success. a

a represents the vertical staves of the silo body, adjacent the continuous door opening 5, the latter being provided with parallel door jambs 0. Lateral brace members d connect the door j ambs at spaced intervals so as to provide individual door openings, and (Z are the bands encompassing the silo. The door 6 is removable, as shown. The door e is provided on the outside with verti- Specification of Letters Patent. Patent- 3d Jung 12 191?.

Application filed February 4, 1916.

Serial No. 76,212.

cal cleats f which are connected by the lateral strip of iron 9, bent in such shape as to form a ladder step. These features are, of course, common to silos. Holes are bored in the door jambs 0, near each corner of the door opening, and the inner end of each hole is provided with a bushing h, which extends only partially therethrough so as to leave room at the outer end for packing 6. Furthermore, the bore of the bushings is tangent to the edge of the door 6. A plate y, provided with a hole in axial alinement with the bushing h, is held firmly in place over the packing i by the screws 71:. A shaftlike member m is provided on its inner end with a lateral toe n and its outer end is flattened as indicated by 0. Said shaft is longitudinally and rotatably movable in the bushing h, the packing 6 serving to render the bearing air-tight. The lateral toe a is rounded on the inner side of its extremity, as indicated by Z in Fig. 3. On the flattened end 0 of the shaft m is pivoted a cam lock lever 79, the handle of which is indicated by q and the cam by r. The locking devices are preferably located near the four corners of the door opening and operate substantially as follows:

In Figs. 2 and 3, the shaft m is shown adjusted to a position where the lateral toe n will engage the rear side of the door e, and by virtue of the cam lock lever 7) the door will be clamped tightly up against the sides of the door opening and locked in place. When the door is to be removed from the door opening, the cam lock 79 is rotated vertically 180 degrees, which will release the locking engagement of the cam r with the plate The shaft m may then be moved longitudinally to the position indicated by the broken lines A in Fig. 3. By using the handle 9 of the cam lock lever 79 as a lever handle, the shaft m is then rotated about its longitudinal axis so as to throw the toe n to the position illustrated by the broken lines B in Fig. 3. The door 6 may then be readily removed.

To replace the door in air-tight locked position, the steps just enumerated are reversed. In case the locking device becomes loose, shims may be placed under the plate j to cause the cam to act more acutely.

I claim:

In a door fastening for silos, the combination of a hole in the silo adjacent the door opening, a bushing extending partially through the hole, a shaft longitudinally and rotatably mounted in the bushing, a packing gland at the outer end of said bushing, a 10 plate bearing against the outer end of the packing gland, and a cam lever pivoted on the outer end of said shaft, the cam being adapted to bear on said plate, and a lateral toe on the inner end of said shaft.

LEWIS R. ABERCROMBIE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

